Implement clickable plaintext links and dark mode fix (#488)

* Plaintext links are now clickable and fixes dark mode.

- Change `AppxPackageDir` path from `C:\Users\bkaan\Desktop\Packages\` to `$(USERPROFILE)\Desktop\Packages\`, fixes error when building release.
- Plaintext links are now clickable, and match the same subtle style as Windows Mail.
- Remove `!important` from inline styles to allow Dark Reader to properly recolor the element.

* Implement setting for clickable plaintext link

Wino.Core.Domain/Models/Reader/MailRenderingOptions.cs

@@ -7,9 +7,11 @@
     {
         private const bool DefaultLoadImageValue = true;
         private const bool DefaultLoadStylesValue = true;
+        private const bool DefaultRenderPlaintextLinksValue = true;
 
         public bool LoadImages { get; set; } = DefaultLoadImageValue;
         public bool LoadStyles { get; set; } = DefaultLoadStylesValue;
+        public bool RenderPlaintextLinks { get; set; } = DefaultRenderPlaintextLinksValue;
 
         // HtmlDocument.Load call is redundant if all the settings are in default values.
         // Therefore we will purify the HTML only if needed.